British Gas Business kWh Rates & Prices

Call British Gas Business on 0333 202 9766, Monday to Friday, 9am to 5pm. Live chat through your online account is usually the fastest route, and British Gas Lite customers have no phone line at all.

British Gas does not print its numbers on a single contact page. Its contact page asks you to pick a category first, which is why so many people end up searching for the number instead.

The table below saves you that step.

What is the British Gas Business contact number?

0333 202 9766 is the number British Gas publishes on its own business complaints page for business customers. It is an 03 number, so it costs the same as a standard landline call and is included in most mobile bundles.

There is no free 0800 number for general British Gas Business enquiries. The only free line is the gas emergency service on 0800 111 999.

How do you contact British Gas Lite?

You cannot call British Gas Lite. Lite is a deliberately online-only product, and British Gas directs Lite customers to live chat inside their online account rather than to a phone line.

That catches people out, because Lite bills carry British Gas branding and customers assume the main business number will help. If your bill says Lite, chat is your route.

What do you need before you call?

Have your account number ready. British Gas Business account numbers start with BGB, 60 or 67, and your bill will say British Gas business in the About your plan section.

• Account number, plus the full name on the account
• Your business name and the postcode of the supply address
• Your MPAN or MPRN if the query is about a specific meter

Related: How to read a business energy bill

Who do you call in an emergency?

If you smell gas, leave the building and call the National Gas Emergency Service on 0800 111 999. For a power cut, call 105.

Both are free, run 24 hours a day, and are independent of your supplier, as British Gas sets out on its emergencies page.

Log in at britishgas.co.uk/business/login using the email address registered on the account. British Gas Business and British Gas Lite use separate logins, so the wrong one will fail even with correct details.

My Online Account is where British Gas expects business customers to do most things. You can reach it directly at britishgas.co.uk/business/login.

What you need to log in

You need the email address the account was registered with and your password. First-time users register with their account number, the supply postcode and the business name.

If your business has changed hands, the login stays with the registered account holder, not the premises. A new occupier needs a new account rather than the previous owner’s credentials.

Related: What happens on a change of tenancy

Logging in to British Gas Lite

Lite has its own separate login journey, reached from the Lite pages rather than the main business login. Using the standard British Gas Business login with Lite credentials is the single most common reason a login fails.

Check your bill first. If it names Lite, use the Lite route.

What you can do in My Online Account

• View and pay bills, and see your payment history
• Submit meter readings, if you are not on a smart meter
• Check your contract end date, which is what you need before comparing
• Use live chat, which is usually quicker than the phone line
• Access Energy360 usage reporting on eligible commercial accounts

What to do if you cannot log in

Repeated failed attempts lock the account, and British Gas unlocks it automatically after roughly an hour. Waiting is faster than trying to force a reset.

If a password reset email never arrives, check that the address on the account is still one someone at the business can access. Accounts registered to a former employee are a common dead end.

British Gas Business is the commercial supply arm of British Gas, part of FTSE-listed Centrica, and it supplies more than 350,000 UK businesses with gas and electricity.

Part of Centrica

Your supply contract is with British Gas Trading Limited, company number 03078711, registered at Millstream, Maidenhead Road, Windsor. That scale matters: a supplier backed by a FTSE group is unlikely to fail the way smaller suppliers did between 2021 and 2025.

If supplier stability is what is worrying you, our record of failed energy companies shows how the market has thinned out.

One of the Big Six

British Gas sits alongside EDF, E.ON, Scottish Power and SSE in the group still called the Big Six. It is the UK’s largest business energy supplier by customer numbers.

Being large is not the same as being cheapest. It is worth putting British Gas next to Octopus, EDF, E.ON Next and Scottish Power before you renew.

What British Gas offers beyond gas and electricity

Alongside supply it sells smart meters, EV charging, and commercial solar and battery storage. Larger sites get Energy360, its usage reporting platform.

British Gas Business offers fixed-term contracts from 30 days up to five years, deemed and out-of-contract rates, the online-only Lite product, and half-hourly metering for larger sites.

Fixed-rate contracts

A fixed contract locks your unit rate and standing charge for the term. British Gas offers up to five years on zero carbon electricity and up to four on standard deals, which is a longer runway than most suppliers.

Related: Business energy contracts explained

Deemed and out-of-contract rates

Deemed rates apply when you occupy premises and use energy without agreeing a contract. They sit among the priciest rates on the market, commonly 40% to 60% above a negotiated deal, which is why deemed energy contracts are worth escaping quickly.

Microbusinesses get extra protection here. Our guide to micro business energy explains the thresholds and what they entitle you to.

British Gas Lite and half-hourly metering

Lite is a self-service option for smaller firms with a smart meter, priced lower in exchange for no phone support. Larger sites move onto half-hourly metering, where consumption is recorded every 30 minutes and priced accordingly.

High-consumption and multi-site operations are usually better served by a tendered energy procurement approach than by an off-the-shelf fix.

Yes, British Gas includes Zero Carbon electricity as standard on new and renewed fixed business contracts, and offers a fully renewable upgrade at the same price. The standard mix is heavily nuclear, so zero carbon is not the same as renewable.

Zero Carbon as standard

Zero Carbon electricity comes at no extra cost on new fixed deals. It blends renewables with nuclear, which is low carbon but not renewable, and that distinction matters if you report against a renewable target.

The Natural Renewable upgrade and REGOs

The Natural Renewable option is backed 100% by solar, wind and hydro, evidenced by REGO certificates issued by Ofgem, and British Gas prices it the same as its standard Zero Carbon electricity.

The published fuel mix

British Gas publishes its fuel mix each year. For 1 April 2024 to 31 March 2025 it reported 53g of CO2 per kWh and 90% zero carbon.

British Gas holds 4.5 out of 5 on Trustpilot from around 355,000 reviews, checked in September 2026. That profile combines domestic and business customers, so it is not a clean read on the business service.

What the Trustpilot score does and does not tell you

There is no separate Trustpilot profile for British Gas Business. The headline score is dominated by household customers, who vastly outnumber business ones.

Treat it as a signal about the group, not a verdict on business account handling.

What business customers most often raise

• Billing accuracy after a meter exchange or a change of tenancy
• Getting through to a person, particularly on Lite where there is no phone line
• The cost of deemed and out-of-contract rates after a fixed deal ends

Related: How to complain about a business energy supplier

A business electricity switch usually completes in about five working days, and gas in two to three weeks. Your supply never stops, because only the billing supplier changes.

How long a business switch really takes

The five-working-day Energy Switch Guarantee covers households, not businesses. In practice a business electricity switch still lands around five working days, gas takes two to three weeks, and your first bill from the new supplier arrives four to eight weeks in.

Our guide to switching business energy supplier walks through each stage.

You can only switch inside your renewal window or once your contract has ended. Business energy renewals explains when that window opens.

What you will need to compare

• Your business address and the postcode of the supply
• A recent bill, and your annual consumption in kWh
• Your contract end date

Not sure who supplies your premises? Find out who supplies your electricity and gas first.

Switching off a deemed or out-of-contract rate is where the money is. Businesses switching through Utility Saving Expert save an average of £1,952 a year.

VAT on business energy is charged on top of whatever rate you agree.

How to complain or escalate

Start with British Gas on 0333 202 9766 or through its complaints process. If it is unresolved after eight weeks, or you reach deadlock, microbusinesses and small businesses can take it free to the Energy Ombudsman on 0808 196 8660.

Ofgem sets out what protections apply in its business energy advice, and larger businesses get fewer of them than microbusinesses do.